msw-fetch-mock

What problem does it solve?

This Skill solves flaky, slow, and hard-to-control frontend tests by letting you mock HTTP requests deterministically instead of relying on real network services.

Core Features & Use Cases

• API mocking with MSW v2 in Vitest: Define request handlers using http and return typed HttpResponse objects for JSON and other payload types.
• Per-test overrides: Use server.use(...) to customize handlers for a single test while server.resetHandlers() clears overrides automatically.
• Network error simulation: Trigger realistic failure modes (for example HttpResponse.error()) to validate error UI and retry logic.

Quick Start

Configure your MSW handlers and server for Vitest, then run your component or integration tests while the mocked endpoints respond with the data you specified.